Squirtle

Basic Pokemon
When Squirtle blocks, double Squirtle's
toughness until end of turn.
When Squirtle enters the battlefield, scry 2.
{1}{u}, {t}: Evolution (flip this creature face down,
then search your library for a card that evolves from
this creature and put that card onto this creature.
Move all modifications from this creature to the new
card. Both cards will change zones simultaneously,
but only count as one creature)